FFmpeg
Data Structures | Macros | Functions
jpegls.h File Reference

JPEG-LS common code. More...

#include "libavutil/common.h"
#include "avcodec.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct  JpeglsContext
 
struct  JLSState
 

Macros

#define R(a, i)   (bits == 8 ? ((uint8_t *)(a))[i] : ((uint16_t *)(a))[i])
 
#define W(a, i, v)   (bits == 8 ? (((uint8_t *)(a))[i] = v) : (((uint16_t *)(a))[i] = v))
 

Functions

void ff_jpegls_init_state (JLSState *state)
 Calculate initial JPEG-LS parameters. More...
 
static int ff_jpegls_quantize (JLSState *s, int v)
 Calculate quantized gradient value, used for context determination. More...
 
void ff_jpegls_reset_coding_parameters (JLSState *s, int reset_all)
 Calculate JPEG-LS codec values. More...
 
static void ff_jpegls_downscale_state (JLSState *state, int Q)
 
static int ff_jpegls_update_state_regular (JLSState *state, int Q, int err)
 

Detailed Description

JPEG-LS common code.

Definition in file jpegls.h.

Macro Definition Documentation

#define R (   a,
  i 
)    (bits == 8 ? ((uint8_t *)(a))[i] : ((uint16_t *)(a))[i])

Definition at line 123 of file jpegls.h.

#define W (   a,
  i,
 
)    (bits == 8 ? (((uint8_t *)(a))[i] = v) : (((uint16_t *)(a))[i] = v))

Function Documentation

void ff_jpegls_init_state ( JLSState state)

Calculate initial JPEG-LS parameters.

Definition at line 31 of file jpegls.c.

Referenced by encode_picture_ls(), and ff_jpegls_decode_picture().

static int ff_jpegls_quantize ( JLSState s,
int  v 
)
inlinestatic

Calculate quantized gradient value, used for context determination.

Definition at line 57 of file jpegls.h.

Referenced by ls_decode_line(), and ls_encode_line().

void ff_jpegls_reset_coding_parameters ( JLSState s,
int  reset_all 
)

Calculate JPEG-LS codec values.

Definition at line 62 of file jpegls.c.

Referenced by encode_picture_ls(), ff_jpegls_decode_picture(), ff_jpegls_quantize(), and ls_store_lse().

static void ff_jpegls_downscale_state ( JLSState state,
int  Q 
)
inlinestatic

Definition at line 89 of file jpegls.h.

Referenced by ff_jpegls_update_state_regular(), ls_encode_runterm(), and ls_get_code_runterm().

static int ff_jpegls_update_state_regular ( JLSState state,
int  Q,
int  err 
)
inlinestatic

Definition at line 99 of file jpegls.h.

Referenced by ls_encode_regular(), and ls_get_code_regular().